<!DOCTYPE html>
<head>
<link rel="help" href="https://crbug.com/352467338">
<title>Zero available width + break-spaces</title>
<style>
body {
  margin-right: 1000%;
}
span {
  white-space-collapse: break-spaces;
}
</style>
</head>
<body dir="rtl">
<ruby><span>A  A  A</span><rt></rt></ruby>
</body>
